SPoT is a tractor train that hauls supplies and fuel using sleds in lieu of aircraft. The traverse stopped twice at the South Pole Station, delivering about 140,000 gallons of fuel. The SPoT team also drove more than 800 miles round trip to an abandoned field camp to remove 80,000 pounds of cargo. On the homestretch, the team even picked up a science instrument nearby its route on the ice shelf that had flown around the continent aboard a high-altitude balloon. All that driving around saved the U.S. Antarctic Program an estimated 65 LC-130 flights. That makes those planes available for other missions around the continent, as well as saves fuel and carbon footprint.